Balanced valve



Aus.A 24, 1937, A

w. F. MEslNGER 2 Sheets-Sheet l INVENTOR WILLIAM F. MESINGER A1TORNEY Aug. 24, 1937. w, F .,EsmmRY 2,091,051

BALANCED VALVE `Qf5 (6T n F|G.2

' lNvl-:NTo'R WILLIAM E MESINGER BY f l 1 ATTORNEY Patentedl Aug. j24,

iran STATES PATENT -oFfFicE-y BALANCED VALVE William Mesinger, Flushing, N. Y.,assignor.' by mesne assignments, to Union (iarbide' and, Carbon Corporation, a corporation ot New Yorlrapplication December so, 1932, serial No. 549,485' claims. (ci. j sli-23) This invention relates to the balancing of valves in control of the flow of iluid through a f passage and more particularly to the use of such balanced valves in iluid pressure regulatorsfor 5 maintaining the discharge pressure of fluid passing through such regulators uniform.

In regulators of this characten'there has heretofore been provided a casing with a passage therethrough divided into inlet and outlet portions in which the ilow of iiuid from the inlet to the outlet portion is under control of a valveA operated automatically by pressure-responsive means, as a diaphragm, under iniiuence ofA changes in pressure on the outlet side of the valve and suitably connected with the valve so objectionably wide' variations in the discharge pressure from that for which the pressure-responsive means is adjusted.

An important object of the invention, therefore, is to provide, in regulator apparatus of the above character having a valve operable under iniiuence of pressure changes on the outlet side thereof for maintaining the discharge pressure oaf. the apparatus uniform, improved means wher'e 'by the valve, in its regulatory movements, will be rendered unresponsive to pressure changes on the inlet side thereof. L

In accordance with this invention, regulator 40. apparatus of the above character embodying the principles of the invention lmay include a control valve under normal operation by means` respon- 1 sive to changes in pressure in the passage on the outlet side of the valve and a pressure responsive memb'er in the passage on the inlet side of the valve which is operable under the in iluenceo pressure changes and so constructed and so connected with the valve-that the effect of changes in head pressure on thevalve andon the pressure responsive member will counter.-

balance each other and nullify. the inuence of such head pressureupon the normal operation of the valve under control of pressure changes in the outlet portion of,t he passage; the pressure .55 responsive member being preferably contractible.`

and expansible under inuence or' pressure changes. f

. 'I'he above vand other objects and the novel .I

features of the invention will be madeapparent f from the following specicatlons taken in con- 5 nection with the accompanying drawings. in

which Fig. 1 is a sectional view of one embodiment of the invention; and '1 Fig. 2 is a sectional view showingl another form 10 of the invention. The iorm of the invention illustrated in Fig. 1 of the drawingsis particularly adapted for use with primers for-internal combustion', engines although not limited to such use. In this form of 15 the invention there is provided a casing A having a passage B therethroughdivlded by a partition P into inlet and outlet chambers I and O; the partition having a port I4 'therethrough controlled by va valve V operable automatically 20 under inuence Iof' pressure changes in the outlet4 chamber 0- as exerted-on the valve through movements o! pressurefresponsive means, such as a diaphragm D secured in theA outlet chamber.

'Ihe casing A has an inlet port I0 opening into 25 the inlet chamber I and an outlet port I I through which the outlet chamber 0 discharges-and to these ports are respectively connected conduits i2 and I3 leading i'ronrfa. source of fluid supplyl and o suitable distributing apparatusv (not 30 sho The eectof head-pressure on the normal operation of 'the valve at variance from that for which ,the apparatus is designed, -is eliminated by providing in` the passage on the inlet side oithe valve suitable pressure respon- 35 sive meansil soconnected between the valve .and a iixed support and so constructed and arranged that the eii'ect of force exerted by head pressure upon the valve will be counteracted and substantially eliminated. 40

The conduit I2 may be in the nature of a nipple having an axial bore and threaded into anv aperture I II formed in the wall of the inlet chamber I and the nipple may be counterbored to receive.

a suitablefltering packing I5 which is held be- 45 tween perforated metallic discs I5a and I5b. The outlet port II may be provided 'with a' metering orifice I6 in an oriilce disc I'I which is held Aagainst a washer I8 in the outlet passage I9-by the end oi the conduit I3. v 50 The valve V, incontro] of port I4, may be of any suitable form and as shown has a cylindrical bodyportion 2l and a frustoconical portion 2I at theY lower end thereof beneathwhichyis a head 22 spaced trom the conical portion and conhectdrical portion 20 thereof and a disc 25 between which the diaphragm is clampedl and these elements are held together by a screw 26 screwed` into the cylindrical body and/having a shoulder resting on top 'of the disc. The screwshank is '10 of considerable length and servesas a stem for the valve; the shank extending through an aperture disc 28 and having a head 21 restingthereon and supported thereby; the disk 28, in-turn', resting upon a heavy spring 29 which rests on a the cap or bonnet 3 ofthe casing.

This cap 3| serves as a removable closure for the outlet chamber O and is in threaded engagement with thebody of the casing A; serving also to clamp the edges ofthe diaphragm D against a shoulder 32. Leakage around the diaphragm is prevented by provision of a suitable gasket 33 of paper or other suitable material between the edges of the diaphragm and shoulder 32 and a diaphragm which may be of paper or 'a soft metal such as brass.

The valve V is normally held closed by the upward thrust of spring 29 against the disc 28 and 0 may be freed to open and close under influence of pressure changes in the outlet chamber Aby compression of this spring. Suitable means whereby this may be accomplished is provided and comprises a cap 35 resting on the disc 28 and adapted. to be pressed down inthe bore 30 by means of a hand lever 36 which is pivoted at 31 to a ring 38; the ring being for purposes of assembly, removably secured to the cap 3| by set screws 39 extending into an annular groove 0 4|] formed in the cap. The lever has a long arm 4| for operation thereof and a short arm 42 contacting intermediately of its ends on a ball bearing 43 carried in a recess 44 .in the top of the cap 35. Movement of the lever is limited by extending the short arm across the bore 30 into the notch 45 formed in the ring 38 but should be adequate to' insure sufficient compression of spring 29 to permit freedom of movement of the valve V under influence of changes in pressure -in -the outlet 0 chamber.

When the spring 29 is so compressed, the valve will be hold in suspension by the diaphragm D and its normal position relative to its port |4 will be determined by proper adjustment of suit- 55 able yieldable means -as a tension spring 46 connected between the valve and an adjustable member, as a plug 41, threaded into a bore 48 at the lower end of the inlet chamber I; the bore being formed, in the present embodiment, in a 60 removable, annular, closure plug 49 threaded into the lower end of vided in its end with sockets 50 to accommodate a turning tool and with a central bore 5| to accommodatev the shank of a pin 52 forming a swivel 5 connection between the plug 41 and spring 46. The pin has ahead 53 at'its lower end resting in a socket 54 at the lower end of bore 5| and the head is provided with a kerf 55 to accommodate a tool for holding the pin stationary when the- 0 plug 41 is being turned for making adjustments of the spring tension.

'end of a nut 55a whichis threaded onto a shank 55h projecting from the under side of the valve. 5 'I'he inletvchamber I is preferably in the nature shoulder 30 at `the bottom of a bore formed inv second gasket 34 may be placed on top of the chamber I. The plug 41 is pro- The upperend of theu` .spring 46 is hooked into an eye provided on the ed thereto by a neck 23 thereby providing an of a cylindrical bore and is providedatits uppel` end with a recess 56 for reception of an annular seat 51 for the valve; the seat being preferably of somewhat yielding material so as to make with the valve, a substantially leakproof closure. The l In order to'counteract the effect of pressure uctuations in the inlet chamber I at suiciently 'wide variance from the normal for which the apparatus is adjusted to objectionably affect the normal regulatory movements of the valve, there is provided in the bore of chamber I a contractible sleeve in the nature of an accordionlike bellows preferably made of resilient metal, as copper, and having circumferential pleats throughout its length. The sleeve is secured, at its upper end, in the annular groove 24 in the valve V to which it is hermetically sealed by a ring of solder 22a or otherwise,'and the lower end of the sleeve is similarly secured to'a sup-4 porting ring 6l held between the'end of the sleeve 58 and the closure plug 49.

When fluid enters the inlet chamber, it acts on the rear face of the conical portion of the valve tending to close it and, when its pressure is sufciently great, tends to seriously interfere with the proper operation of the valve for maintaining the fluid in chamber O atthe pressure for which the apparatus has been adjusted. This .tendency however is overcome in the present apparatus by vproviding a proper balance between the effective surface of the sleeve 60 and the effective area of the valve surface against which the pressure in the inlet chamber acts or would act if the contractile sleeve 60 were not provided.' With such apparatus properly adjusted and balanced the valve will operate under outlet pressure only and wi1l deliver fluid at the pressure for which the apparatus has been adjusted.

The apparatus as shown in Fig. 2 differs from that shown in Fig. 1 mainly in the omission of spring 46 and the functioning of the heavy spring above the diaphragm D.

V relative to itsport is effected by adjustment o f yieldable pressure means as a spring 29a resting on top of the diaphragm D by means of the plugs 62 threaded into the bore of a tubular neck 63 which is formed as part of the closure cap 64 for the outlet chamber. The sleeve 58 of the apparatus vshown in Fig. 1 is also omitted and the valve seat 51 is held in place by a ring screw 65. The supporting ring 6| is secured against a shoulder 66 at the lower end of the inlet chamber by the closure cap 61 which is centrally apertured at 68 to expose the interior of the sleeve 60 to atmospheric pressure. Cap 64 is also vented at 69 to expose the upper side of diaphragm D to atmospheric pressure. The yieldable pressure means 29a is preferably of such character that areas should diil'er byl an amount sumcient to.

cause a change in'relative force therebetween the spring dueto movement oi' the valve.

'I'he operation oi' this form 'of apparatus is l0 similar to that in Fig. 1 as a regulator but is not well adapted to the priming of internal com- -bustion engines since the valve V is normally held open. Y Also, when itis desired `to more, exactly balance `out the variations inhead pressure on the valve, the portion of the inlet chariber-I on the opposite side of the partition formed-by the bellows 60 and-the supporting'disc 6l from that in which the valve is located may be placed in com# municaton withthe outlet passage Il. By'thlsV let portions, means includinga valve for contromng the now of :uuid through said efrom the inlet to, the outlet portionsl thereof, means, including a spring acting vto open said valve disposed in'the inlet portion of said pas- 3. sage, responsive to changes in the pressure of the regulating said valve, va resilient bellows enclosing said spring responsive to changes in pressure of the tluid in the inlet chamber having an eifective area such astoprovide a force counteracting 40 the force exerted by such uid upon the eiIective area of the valveas the fluid pressure varies, a

second spring stronger than said first-mentioned spring andv acting in opposition thereto .on the valve for normally .maintaining said valve in aY closed position,- and -meansfor rendering said f second-mentioned spring inoperative at will'. 2. Pressure regulating'apparatus comprising `the combination of a casing having a passage extending therethroughdivided into inletlandj^ outlet portions; means' including aj valve for con-l trolling the iiow ofiluid from the inlet to the:

outlet portions -oif saidpassage; means including an adjustable tension spring disposedin the inlet portion of said passage and means responsive to variations in the pressure of the fluid in the outlet portion of-.said passage for regulatingsaid valve; 'a resilient bellows enclosing .said sp responsive tov changes in pressure of the iluidin.

, the inlet chamber having an eiective area. such was toprovide aiorce for counter-acting the force exerted by such fluid upon the -eiective area.` oi' the valve aspthe duid pressure varies; a secon'd spring disposed adjacent the outlet portion 'of said passage and adapted to act-in op 65 will; and means for adjusting the tension of d I f first named spring without interfering-with the -v normal setting of -said 'second spring.

on'theout casing having a iiuid' passage extending thereiluid in the'routletportlon of said passage for;

tion'to. the rst named spring upon' said valve: means for rendering -said second spring inoperative at -3. Apparatus comprising thev combination of a casing having a uidpassage extending there.-

through, means having a port therein for divlding said e into. inlet and outlet chamters. a. valve for controlling the new of nula through said vport from said. inlet-to said outlet sumcient to compensate for changes in force oi! chamber, means connected, ,to and controlling said valve including pressure responsive means disposed in said outlet chamber responsive to changes in the pressure of iluid therein^and al coil spring acting to open said valve with a force that diminishes as the valve opens, anda resil-A ient contractile sleeve Having an ,end connected to said valve and responsive to variations in the oI-the fluid. in said inlet chamher'i'or opposing the eiect of inlet pressure on said valve,

vide a variation in the relative force therebetween that compensates forl the diminishing force of the spring as the valve opens.

- 4. Apparatus-comprising the combination of a through, means having a port' therein for dividing said passage into inlet and outlet chambers, a valve for controlling 'the iiow 'of iluid through said port from said inlet to said outlet chamber, means connected to and controlling said valve including pressure responsive means disposed in said outlet' chamberresponsive to changes in the pressure of iluid therein and a coil spring acting to open said valve witha force that diminishes as the valve opens,and a resilient contractile sleeve having an end connected to said valve and responsiveto variations in the pressure of the fluid in said ilet chamber for opposing the'reiect of4 inlet pressure on said valve, said sleeve having an eiectivearea exposed to -inlet pressure substantially equal to the corresponding, area of -said valve 'and providing. a resilient eilect opposing the effect of force changes as the valve opens.

vsaidsleeve having anieiective varea exposed to .inlet pressure smaller than they corresponding larea oi said valve byan amount sumcient to pro- 5.- Pressure regulating apparatus `comprising'- the combination of a casing having a passage-extending therethrough divided into inlet and out' 4let portions, meansincli'ding a valve for .con-f `trolling the flow of fluid from the inlet to the outlet portions of said passage, means including l a `valve control spring disposed in the inlet por' tion of said passage andmeans responsive to varlatlons in the pressure ofthe uid inthe out- Alet portion of said passage y,ior' regulating said valve, and a resilient contractile sleeve arranged AAc'caxially with said valve and having the ends thereof connected to said valve and to said casing? s uch'sleeve being disposed coaxially about said valve control spring and having an` effective area responsive to varlationsin the pressure of the duid in .the inlet portion 'of said'passage substantiali'y'equalto the edective area of said valve on,l which fluid pressure acts for counteracting 'the force exerted upon the' inlet side of said valve when the pressure of the fluid varies and cooperating with said spring for reducing the effect ,of force changes as the valve opens.

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